Here is a sample of Armenian vocabulary, with the stemmed forms that will be generated by this algorithm:
| word | stem | word | stem | |||||||||
|
աղոթում աղոթք աղոթքը աղոթքի աղոթքին աղոթքից աղոթքն աղոթքներ աղոթքները աղոթքների աղոթքներին |
⇒ |
աղոթ աղոթ աղոթ աղոթ աղոթ աղոթ աղոթ աղոթ աղոթ աղոթ աղոթ |
բանաձևեր բանաձևերը բանաձևերի բանաձևերից բանաձևերն բանաձևերով բանաձևերում բանաձևը բանաձևի բանաձևին բանաձևից |
⇒ |
բանաձև բանաձև բանաձև բանաձև բանաձև բանաձև բանաձև բանաձև բանաձև բանաձև բանաձև |
This stemmer for Armenian was developed and contributed by Astghik Mkrtchyan.
The following characters are vowels for the purposes of this algorithm:
R2 is the region after the first non-vowel following a vowel after the first non-vowel following a vowel, or the end of the word if there is no such non-vowel.
RV has the same definition as in the Spanish stemmer.
The algorithm has a fairly simple structure which only removes suffixes. There are four steps, applied in turn:
See the Snowball implementation of the stemmer below for the lists of suffixes each step checks for.
stringescapes {}
stringdef a '{U+0561}' // 531
stringdef b '{U+0562}' // 532
stringdef g '{U+0563}' // 533
stringdef d '{U+0564}' // 534
stringdef ye '{U+0565}' // 535
stringdef z '{U+0566}' // 536
stringdef e '{U+0567}' // 537
stringdef y '{U+0568}' // 538
stringdef dt '{U+0569}' // 539
stringdef zh '{U+056A}' // 53A
stringdef i '{U+056B}' // 53B
stringdef l '{U+056C}' // 53C
stringdef kh '{U+056D}' // 53D
stringdef ts '{U+056E}' // 53E
stringdef k '{U+056F}' // 53F
stringdef h '{U+0570}' // 540
stringdef dz '{U+0571}' // 541
stringdef gh '{U+0572}' // 542
stringdef djch '{U+0573}' // 543
stringdef m '{U+0574}' // 544
stringdef j '{U+0575}' // 545
stringdef n '{U+0576}' // 546
stringdef sh '{U+0577}' // 547
stringdef vo '{U+0578}' // 548
stringdef ch '{U+0579}' // 549
stringdef p '{U+057A}' // 54A
stringdef dj '{U+057B}' // 54B
stringdef r '{U+057C}' // 54C
stringdef s '{U+057D}' // 54D
stringdef v '{U+057E}' // 54E
stringdef t '{U+057F}' // 54F
stringdef r' '{U+0580}' // 550
stringdef c '{U+0581}' // 551
stringdef u '{U+0582}' // 552 //vjun
stringdef bp '{U+0583}' // 553
stringdef q '{U+0584}' // 554
stringdef ev '{U+0587}'
stringdef o '{U+0585}' // 555
stringdef f '{U+0586}' // 556
routines ( mark_regions R2
adjective
verb
noun
ending
)
externals ( stem )
integers ( pV p2 )
groupings ( v )
define v '{a}{e}{i}{o}{u}{ye}{vo}{y}'
define mark_regions as (
$pV = limit
$p2 = limit
do (
gopast v setmark pV gopast non-v
gopast v gopast non-v setmark p2
)
)
backwardmode (
define R2 as $p2 <= cursor
define adjective as (
[substring] among (
'{b}{a}{r'}'
'{p}{ye}{s}'
'{vo}{r'}{e}{n}'
'{vo}{v}{i}{n}'
'{a}{k}{i}'
'{l}{a}{j}{n}'
'{r'}{vo}{r'}{d}'
'{ye}{r'}{vo}{r'}{d}'
'{a}{k}{a}{n}'
'{a}{l}{i}'
'{k}{vo}{t}'
'{ye}{k}{ye}{n}'
'{vo}{r'}{a}{k}'
'{ye}{gh}'
'{v}{vo}{u}{n}'
'{ye}{r'}{ye}{n}'
'{a}{r'}{a}{n}'
'{ye}{n}'
'{a}{v}{ye}{t}'
'{g}{i}{n}'
'{i}{v}'
'{a}{t}'
'{i}{n}'
(delete)
)
)
define verb as (
[substring] among (
'{vo}{u}{m}'
'{v}{vo}{u}{m}'
'{a}{l}{vo}{u}'
'{ye}{l}{vo}{u}'
'{v}{ye}{l}'
'{a}{n}{a}{l}'
'{ye}{l}{vo}{u}{c}'
'{a}{l}{vo}{u}{c}'
'{y}{a}{l}'
'{y}{ye}{l}'
'{a}{l}{vo}{v}'
'{ye}{l}{vo}{v}'
'{a}{l}{i}{s}'
'{ye}{l}{i}{s}'
'{ye}{n}{a}{l}'
'{a}{c}{n}{a}{l}'
'{ye}{c}{n}{ye}{l}'
'{c}{n}{ye}{l}'
'{n}{ye}{l}'
'{a}{t}{ye}{l}'
'{vo}{t}{ye}{l}'
'{k}{vo}{t}{ye}{l}'
'{t}{ye}{l}'
'{v}{a}{ts}'
'{ye}{c}{v}{ye}{l}'
'{a}{c}{v}{ye}{l}'
'{ye}{c}{i}{r'}'
'{a}{c}{i}{r'}'
'{ye}{c}{i}{n}{q}'
'{a}{c}{i}{n}{q}'
'{v}{ye}{c}{i}{r'}'
'{v}{ye}{c}{i}{n}{q}'
'{v}{ye}{c}{i}{q}'
'{v}{ye}{c}{i}{n}'
'{a}{c}{r'}{i}{r'}'
'{a}{c}{r'}{ye}{c}'
'{a}{c}{r'}{i}{n}{q}'
'{a}{c}{r'}{i}{q}'
'{a}{c}{r'}{i}{n}'
'{ye}{c}{i}{q}'
'{a}{c}{i}{q}'
'{ye}{c}{i}{n}'
'{a}{c}{i}{n}'
'{a}{c}{a}{r'}'
'{a}{c}{a}{v}'
'{a}{c}{a}{n}{q}'
'{a}{c}{a}{q}'
'{a}{c}{a}{n}'
'{v}{ye}{c}{i}'
'{a}{c}{r'}{i}'
'{ye}{c}{a}{r'}'
'{ye}{c}{a}{v}'
'{c}{a}{n}{q}'
'{c}{a}{q}'
'{c}{a}{n}'
'{a}{c}{a}'
'{a}{c}{i}'
'{ye}{c}{a}'
'{ch}{ye}{l}'
'{ye}{c}{i}'
'{a}{r'}'
'{a}{v}'
'{a}{n}{q}'
'{a}{q}'
'{a}{n}'
'{a}{l}'
'{ye}{l}'
'{ye}{c}'
'{a}{c}'
'{v}{ye}'
'{a}'
(delete)
)
)
define noun as (
[substring] among (
'{a}{ts}{vo}'
'{a}{n}{a}{k}'
'{a}{n}{o}{c}'
'{a}{r'}{a}{n}'
'{a}{r'}{q}'
'{p}{a}{n}'
'{s}{t}{a}{n}'
'{ye}{gh}{e}{n}'
'{ye}{n}{q}'
'{i}{k}'
'{i}{ch}'
'{i}{q}'
'{m}{vo}{u}{n}{q}'
'{j}{a}{k}'
'{j}{vo}{u}{n}'
'{vo}{n}{q}'
'{vo}{r'}{d}'
'{vo}{c}'
'{ch}{ye}{q}'
'{v}{a}{ts}{q}'
'{v}{vo}{r'}'
'{a}{v}{vo}{r'}'
'{vo}{u}{dt}{j}{vo}{u}{n}'
'{vo}{u}{k}'
'{vo}{u}{h}{i}'
'{vo}{u}{j}{dt}'
'{vo}{u}{j}{q}'
'{vo}{u}{s}{t}'
'{vo}{u}{s}'
'{c}{i}'
'{a}{l}{i}{q}'
'{a}{n}{i}{q}'
'{i}{l}'
'{i}{ch}{q}'
'{vo}{u}{n}{q}'
'{g}{a}{r'}'
'{vo}{u}'
'{a}{k}'
'{a}{n}'
'{q}'
(delete)
)
)
define ending as (
[substring] R2 among (
'{n}{ye}{r'}{y}'
'{n}{ye}{r'}{n}'
'{n}{ye}{r'}{i}'
'{n}{ye}{r'}{d}'
'{ye}{r'}{i}{c}'
'{n}{ye}{r'}{i}{c}'
'{ye}{r'}{i}'
'{ye}{r'}{d}'
'{ye}{r'}{n}'
'{ye}{r'}{y}'
'{n}{ye}{r'}{i}{n}'
'{vo}{u}{dt}{j}{a}{n}{n}'
'{vo}{u}{dt}{j}{a}{n}{y}'
'{vo}{u}{dt}{j}{a}{n}{s}'
'{vo}{u}{dt}{j}{a}{n}{d}'
'{vo}{u}{dt}{j}{a}{n}'
'{ye}{r'}{i}{n}'
'{i}{n}'
'{s}{a}'
'{vo}{dj}'
'{i}{c}'
'{ye}{r'}{vo}{v}'
'{n}{ye}{r'}{vo}{v}'
'{ye}{r'}{vo}{u}{m}'
'{n}{ye}{r'}{vo}{u}{m}'
'{vo}{u}{n}'
'{vo}{u}{d}'
'{v}{a}{n}{s}'
'{v}{a}{n}{y}'
'{v}{a}{n}{d}'
'{a}{n}{y}'
'{a}{n}{d}'
'{v}{a}{n}'
'{vo}{dj}{y}'
'{vo}{dj}{s}'
'{vo}{dj}{d}'
'{vo}{c}'
'{vo}{u}{c}'
'{vo}{dj}{i}{c}'
'{c}{i}{c}'
'{v}{i}{c}'
'{v}{i}'
'{v}{vo}{v}'
'{vo}{v}'
'{a}{n}{vo}{v}'
'{a}{n}{vo}{u}{m}'
'{v}{a}{n}{i}{c}'
'{a}{m}{b}'
'{a}{n}'
'{n}{ye}{r'}'
'{ye}{r'}'
'{v}{a}'
'{y}'
'{n}'
'{d}'
'{c}'
'{i}'
(delete)
)
)
)
define stem as (
do mark_regions
backwards setlimit tomark pV for (
do ending
do verb
do adjective
do noun
)
)